ANSWER KEY *** of the Four Elements, Which Has Properties

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*** ANSWER KEY *** Student Name: Grade: 09

Test Name: November Chemistry for All: Unit 2 - Periodic Table Version: 1

1. Of the four elements, which has properties most similar to that of sodium (Na)?

(a) boron (B) (b) sulfur (S) (c) calcium (Ca) (d) nitrogen (N)

Standard:

MI_CHEM_HS-0912-C4-9-A MI HSCEs Science - Chemistry 09-12 STANDARD C4: PROPERTIES OF MATTER Topic C4.9 Periodic Table C4.9A Identify elements with similar chemical and physical properties using the periodic table.

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2. Based on their locations on the periodic table, which of the following is true about oxygen (O) and selenium (Se)?

(a) they have the same number of neutrons (b) they have the same conductivity (c) they have similar properties (d) they have the same number of electron orbitals

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3. Looking at the periodic table, which is true about neon (Ne) and argon (Ar)?

(a) both are very stable (b) both are good conductors of electricity (c) both are highly reactive (d) both are explosive when combined with oxygen

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4. Looking at the periodic table, which is true about beryllium (Be) and calcium (Ca)?

(a) both are less reactive than lithium (Li) and potassium (K) (b) both are less reactive than neon (Ne) and krypton (Kr) (c) both are less dense than lithium (Li) and sodium (Na) (d) both have the same electron configurations as chlorine (Cl) and bromine (Br)

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5. Using the periodic table, identify which element is a metal.

(a) chlorine (Cl) (b) krypton (Kr) (c) selenium (Se) (d) zinc (Zn)

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MI_CHEM_HS-0912-C4-9x-b MI HSCEs Science - Chemistry 09-12 STANDARD C4: PROPERTIES OF MATTER Topic C4.9x Electron Energy Levels C4.9b Identify metals, non-metals, and metalloids using the periodic table.

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6. Using the periodic table, which element is a non-metal?

(a) boron (B) (b) calcium (Ca) (c) selenium (Se) (d) lead (Pb)

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7. Using the periodic table, which of the following is an example of a metalloid?

(a) hydrogen (H) (b) boron (B) (c) manganese (Mn) (d) silver (Ag)

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8. Imagine a new element is discovered. This element has a shiny luster and conducts electricity only moderately. In which region would you place this element? Explain your choice

(a) (b) (c) (d)

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9. Using the periodic table and the graph below, which statement best describes the trend in atomic radii as you move across a period on the periodic table?

(a) atomic radii generally decrease across a period (b) atomic radii generally increase across a period (c) elements in the same period have the same size atoms (similar atomic radii) (d) atomic radii are not affected by location on the periodic table

Standard:

MI_CHEM_HS-0912-C4-9x-c MI HSCEs Science - Chemistry 09-12 STANDARD C4: PROPERTIES OF MATTER

Topic C4.9x Electron Energy Levels C4.9c Predict general trends in atomic radius, first ionization energy, and electonegativity of the elements using the periodic table.

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10. Observe the atomic radii of the group 1 elements (Li, Na, K, Rb and Cs) on the graph. Which statement best describes the trend in atomic radii as you move down group?

(a) atomic radii decrease down a group (b) atomic radii increase down a group (c) elements in the same group have the same size atoms (similar atomic radii) (d) atomic radii are not affected by location on the periodic table

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MI_CHEM_HS-0912-C4-9x-c MI HSCEs Science - Chemistry 09-12 STANDARD C4: PROPERTIES OF MATTER

Topic C4.9x Electron Energy Levels C4.9c Predict general trends in atomic radius, first ionization energy, and electonegativity of the elements using the periodic table.

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11. Using the periodic table, which element has the highest electronegativity?

(a) flourine (F) (b) iodine (I) (c) boron (B) (d) hydrogen (H)

Standard:

MI_CHEM_HS-0912-C4-9x-c MI HSCEs Science - Chemistry 09-12 STANDARD C4: PROPERTIES OF MATTER

Topic C4.9x Electron Energy Levels C4.9c Predict general trends in atomic radius, first ionization energy, and electonegativity of the elements using the periodic table.

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12. Which diagram shows the correct periodic trends for increasing electronegativity?

(a)

(b)

(c)

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MI_CHEM_HS-0912-C4-9x-c MI HSCEs Science - Chemistry 09-12 STANDARD C4: PROPERTIES OF MATTER

Topic C4.9x Electron Energy Levels C4.9c Predict general trends in atomic radius, first ionization energy, and electonegativity of the elements using the periodic table.

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13. Copper has two naturally occurring isotopes. Use the data table to calculate the average atomic mass

Isotope Mass (amu) % abundance Cu-63 62.94 amu 69.17% Cu-65 64.93 amu 30.83

(a) 20.02 amu (b) 43.53 amu (c) 63.55 amu (d) 63.94 amu

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MI_CHEM_HS-0912-C4-10x-c MI HSCEs Science - Chemistry 09-12 STANDARD C4: PROPERTIES OF MATTER

Topic C4.10x Average Atomic Mass C4.10c Calculate the average atomic mass of an element given the percent abundance and mass of the individual isotopes.

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14. Calculate the average atomic mass of oxygen. Use the data table below

Isotope Mass (amu) % abundance O-16 15.99 99.76 O-17 17.00 0.038 O-18 18.00 0.20

(a) 15.99 amu (b) 16.99 amu (c) 17.00 amu (d) 18.00 amu

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MI_CHEM_HS-0912-C4-10x-c MI HSCEs Science - Chemistry 09-12 STANDARD C4: PROPERTIES OF MATTER

Topic C4.10x Average Atomic Mass C4.10c Calculate the average atomic mass of an element given the percent abundance and mass of the individual isotopes.

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Instructions for questions 15 through 17.

An unknown element has three natural isotopes. Using the information below to answer the next three questions

Isotope Atomic mass (amu) % abundance A 19.992 90.48 B 20.994 ? C 21.991 9.25

15. What is the percent abundance of isotope B?

(a) 0.27% (b) 9.52% (c) 81.43% (d) 99.73%

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MI_CHEM_HS-0912-C4-10x-c MI HSCEs Science - Chemistry 09-12 STANDARD C4: PROPERTIES OF MATTER

Topic C4.10x Average Atomic Mass C4.10c Calculate the average atomic mass of an element given the percent abundance and mass of the individual isotopes.

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16. What is the average atomic mass of this element?

(a) 19.99 amu (b) 20.99 amu (c) 20.18 amu (d) 21.18 amu

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MI_CHEM_HS-0912-C4-10x-c MI HSCEs Science - Chemistry 09-12 STANDARD C4: PROPERTIES OF MATTER

Topic C4.10x Average Atomic Mass C4.10c Calculate the average atomic mass of an element given the percent abundance and mass of the individual isotopes.

17. What is the identity of this element?

(a) Helium (H) (b) Neon (N) (c) Argon (Ar) (d) Krypton (Kr)

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MI_CHEM_HS-0912-C4-10x-c MI HSCEs Science - Chemistry 09-12 STANDARD C4: PROPERTIES OF MATTER

Topic C4.10x Average Atomic Mass C4.10c Calculate the average atomic mass of an element given the percent abundance and mass of the individual isotopes.

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18. Based on the average atomic mass of Oxygen (15.99 amu) which of the following isotopes has the highest abundance?

(a) 15O (b) 16O (c) 17O (d) 18O

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MI_CHEM_HS-0912-C4-10x-d MI HSCEs Science - Chemistry 09-12 STANDARD C4: PROPERTIES OF MATTER

Topic C4.10x Average Atomic Mass C4.10d Predict which isotope will have the greatest abundance given the possible isotopes for an element and the average atomic mass in the periodic table.

19. Based on the average atomic mass of Boron (10.81 amu) which isotope has the highest abundance?

(a) 9B (b) 10B (c) 11B (d) 12B

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MI_CHEM_HS-0912-C4-10x-d MI HSCEs Science - Chemistry 09-12 STANDARD C4: PROPERTIES OF MATTER

Topic C4.10x Average Atomic Mass C4.10d Predict which isotope will have the greatest abundance given the possible isotopes for an element and the average atomic mass in the periodic table.

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20. Based on the average atomic mass of Silicon (28.09 amu) which of the following isotoptes will have the greatest abundance?

(a) 27Si (b) 28Si (c) 29Si (d) 30Si

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MI_CHEM_HS-0912-C4-10x-d MI HSCEs Science - Chemistry 09-12 STANDARD C4: PROPERTIES OF MATTER

Topic C4.10x Average Atomic Mass C4.10d Predict which isotope will have the greatest abundance given the possible isotopes for an element and the average atomic mass in the periodic table.

21. Based on the average atomic mass of Chlorine (35.45 amu) which of the following isotopes has the greatest abundance?

(a) 35Cl (b) 36Cl (c) 37Cl (d) 38Cl

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MI_CHEM_HS-0912-C4-10x-d MI HSCEs Science - Chemistry 09-12 STANDARD C4: PROPERTIES OF MATTER

Topic C4.10x Average Atomic Mass C4.10d Predict which isotope will have the greatest abundance given the possible isotopes for an element and the average atomic mass in the periodic table.

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22. Using your periodic table, predict which isotope of Carbon (C) has the greatest abundance?

(a) 12C (b) 13C (c) 14C (d) 15C

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MI_CHEM_HS-0912-C4-10x-d MI HSCEs Science - Chemistry 09-12 STANDARD C4: PROPERTIES OF MATTER

Topic C4.10x Average Atomic Mass C4.10d Predict which isotope will have the greatest abundance given the possible isotopes for an element and the average atomic mass in the periodic table.

23. How many atoms are present in 8.00 mol of chlorine atoms?

(a) 3.80 x 1023 Cl atoms (b) 4.82 x 1024 Cl atoms (c) 1.0234 x 1025 Cl atoms (d) 2.13 x 1025 Cl atoms

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MI_CHEM_HS-0912-C5-2x-g MI HSCEs Science - Chemistry 09-12 STANDARD C5: CHANGES IN MATTER Topic C5.2x Balancing Equations C5.2g Calculate the number of atoms present in a given mass of element.

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24. How many moles of calcium are equivalent to 4.52 x 1025 atoms?

(a) 12.5 mol Ca (b) 26.5 mol Ca (c) 50.2 mol Ca (d) 75.1 mol Ca

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MI_CHEM_HS-0912-C5-2x-g MI HSCEs Science - Chemistry 09-12 STANDARD C5: CHANGES IN MATTER Topic C5.2x Balancing Equations C5.2g Calculate the number of atoms present in a given mass of element.

25. Determine the mass in grams of 10.0 mol of bromine (molar mass of Br = 79.90g)

(a) 7.99 g Br (b) 69.9 g Br (c) 89.9 g Br (d) 799 g Br

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MI_CHEM_HS-0912-C5-2x-g MI HSCEs Science - Chemistry 09-12 STANDARD C5: CHANGES IN MATTER Topic C5.2x Balancing Equations C5.2g Calculate the number of atoms present in a given mass of element.

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26. Calculate the number of atoms in 10.0 g of sulfur (molar mass = 32.07 g)

(a) 1.88 x 1023 atoms S (b) 1.32 x 10 25 atoms S (c) 1.93 x 10 26 atoms S (d) 2.53 x 1025 atoms S

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MI_CHEM_HS-0912-C5-2x-g MI HSCEs Science - Chemistry 09-12 STANDARD C5: CHANGES IN MATTER Topic C5.2x Balancing Equations C5.2g Calculate the number of atoms present in a given mass of element.

27. Calculate the mass in grams of 3.80 x 105 atoms of mercury (molar mass = 200.59g)

(a) 1.27 x 10-16 g Hg (b) 1.89 x 103 g Hg (c) 7.62 x 1020 g Hg (d) 3.18 x 1020 g Hg

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MI_CHEM_HS-0912-C5-2x-g MI HSCEs Science - Chemistry 09-12 STANDARD C5: CHANGES IN MATTER Topic C5.2x Balancing Equations C5.2g Calculate the number of atoms present in a given mass of element.

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28. Predict whether the bond formed between Iron (Fe) and Bromine (Br) would be ionic or covalent?

(a) ionic (b) covalent

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MI_CHEM_HS-0912-C5-5-A MI HSCEs Science - Chemistry 09-12 STANDARD C5: CHANGES IN MATTER Topic C5.5 Chemical Bonds — Trends C5.5A Predict if the bonding between two atoms of different elements will be primarily ionic or covalent.

29. Predict whether the bond between Potassium (K) and Chlorine (Cl) would be ionic or covalent.

(a) ionic (b) covalent

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30. Predict whether the bonds formed between Carbon(C) and Nitrogen(N) are ionic or covalent.

(a) ionic (b) covalent

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31. Predict whether the bond between Sulfur (S) and Oxygen (O) would be ionic or covalent.

(a) ionic (b) covalent

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32. What type of compound would a metal bonded to a nonmetal form?

(a) covalent (b) ionic (c) metalloid (d) transitional

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33. What type of compounds form when atoms share electrons?

(a) covalent (b) ionic (c) metalloid (d) transitional

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34. Which of the following compounds is ionic?

(a) CaCl2 (b) CH4 (c) AlPO4 (d) C6H12O6

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35. Which of the following compounds is covalent?

(a) CaCl2 (b) KI (c) CH4 (d) Fe2O3

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36. Which of the following compounds is both covalent and ionic?

(a) CaCl2 (b) KI (c) CH4 (d) AlPO4

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37. Which is the correct formula for a compound formbed by combining Calcium (Ca) and Chlorine(Cl)?

(a) CaCl (b) CaCl2 (c) Ca2Cl (d) Ca2Cl2

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MI_CHEM_HS-0912-C5-5-B MI HSCEs Science - Chemistry 09-12 STANDARD C5: CHANGES IN MATTER Topic C5.5 Chemical Bonds — Trends C5.5B Predict the formula for binary compounds of main group elements.

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38. Which is the correct formula for a compound formed by combining magnesium (Mg) with oxygen (O)?

(a) MgO2 (b) Mg2O2 (c) MgO (d) Mg2O

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MI_CHEM_HS-0912-C5-5-B MI HSCEs Science - Chemistry 09-12 STANDARD C5: CHANGES IN MATTER Topic C5.5 Chemical Bonds — Trends C5.5B Predict the formula for binary compounds of main group elements.

39. Which is the correct formula for a compound formed by combining aluminum (Al) with nitrogen (N)?

(a) Al2N3 (b) Al3N3 (c) AlN3 (d) AlN

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MI_CHEM_HS-0912-C5-5-B MI HSCEs Science - Chemistry 09-12 STANDARD C5: CHANGES IN MATTER Topic C5.5 Chemical Bonds — Trends C5.5B Predict the formula for binary compounds of main group elements.

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40. Which of the following anions could represent “X” in the compound CaX2?

(a) bromide (b) nitride (c) phosphide (d) sulfide

Standard:

MI_CHEM_HS-0912-C5-5-B MI HSCEs Science - Chemistry 09-12 STANDARD C5: CHANGES IN MATTER Topic C5.5 Chemical Bonds — Trends C5.5B Predict the formula for binary compounds of main group elements.

41. Which of the following is a reason CaF is an invalid formula for an ionic compound?

(a) calcium loses two electrons (b) calcium gains two electrons (c) flourine loses two electrons (d) flourine gains two electrons

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MI_CHEM_HS-0912-C5-5-B MI HSCEs Science - Chemistry 09-12 STANDARD C5: CHANGES IN MATTER Topic C5.5 Chemical Bonds — Trends C5.5B Predict the formula for binary compounds of main group elements.

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42. Which of the following is a correct Lewis structure for hydrogen cyanide, HCN?

(a)

(b)

(c)

(d)

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MI_CHEM_HS-0912-C5-5x-c MI HSCEs Science - Chemistry 09-12 STANDARD C5: CHANGES IN MATTER Topic C5.5x Chemical Bonds C5.5c Draw Lewis structures for simple compounds.

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43. Which of the following is the correct Lewis structure for ammonia, NH3?

(a)

(b)

(c)

(d)

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MI_CHEM_HS-0912-C5-5x-c MI HSCEs Science - Chemistry 09-12 STANDARD C5: CHANGES IN MATTER Topic C5.5x Chemical Bonds C5.5c Draw Lewis structures for simple compounds.

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44. Which is the correct formula for the following Lewis structure?

(a) NH (b) NH2 (c) NH3 (d) N2H3

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MI_CHEM_HS-0912-C5-5x-c MI HSCEs Science - Chemistry 09-12 STANDARD C5: CHANGES IN MATTER Topic C5.5x Chemical Bonds C5.5c Draw Lewis structures for simple compounds.

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45. Which is the correct formula for the following Lewis structure?

(a) CO (b) CO2 (c) C2O4 (d) C4O8

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MI_CHEM_HS-0912-C5-5x-c MI HSCEs Science - Chemistry 09-12 STANDARD C5: CHANGES IN MATTER Topic C5.5x Chemical Bonds C5.5c Draw Lewis structures for simple compounds.

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46. Name the following Lewis structure.

(a) SiBr (b) SiBr4 (c) SiBr6 (d) SiBr24

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MI_CHEM_HS-0912-C5-5x-c MI HSCEs Science - Chemistry 09-12 STANDARD C5: CHANGES IN MATTER Topic C5.5x Chemical Bonds C5.5c Draw Lewis structures for simple compounds.

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47. Which of the following types of compounds would display the lowest melting point?

(a) covalent (b) ionic (c) metallic

Standard:

MI_CHEM_HS-0912-C5-5x-d MI HSCEs Science - Chemistry 09-12 STANDARD C5: CHANGES IN MATTER

Topic C5.5x Chemical Bonds C5.5d Compare the relative melting point, electrical and thermal conductivity, and hardness for ionic, metallic, and covalent compounds.

48. Which of the following compounds would be a good conductor of electricity in a solution?

(a) covalent (b) ionic (c) metallic

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MI_CHEM_HS-0912-C5-5x-d MI HSCEs Science - Chemistry 09-12 STANDARD C5: CHANGES IN MATTER

Topic C5.5x Chemical Bonds C5.5d Compare the relative melting point, electrical and thermal conductivity, and hardness for ionic, metallic, and covalent compounds.

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Instructions for questions 49 through 51.

Use the following lab results table to answer questions 49-51.

Solid at room Conducts electricity at room Melting point Conducts electricity as a Substance temperature temperature (celsius) liquid A Solid Yes 1535 Yes B Solid No 755 Yes C Gas No -182.6 No

49. What type of compound is substance A?

(a) covalent (b) ionic (c) metallic

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MI_CHEM_HS-0912-C5-5x-d MI HSCEs Science - Chemistry 09-12 STANDARD C5: CHANGES IN MATTER

Topic C5.5x Chemical Bonds C5.5d Compare the relative melting point, electrical and thermal conductivity, and hardness for ionic, metallic, and covalent compounds.

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50. What type of compound is substance B?

(a) covalent (b) ionic (c) metallic

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MI_CHEM_HS-0912-C5-5x-d MI HSCEs Science - Chemistry 09-12 STANDARD C5: CHANGES IN MATTER

Topic C5.5x Chemical Bonds C5.5d Compare the relative melting point, electrical and thermal conductivity, and hardness for ionic, metallic, and covalent compounds.

51. What type of compound is substance C?

(a) covalent (b) ionic (c) metallic

Standard:

MI_CHEM_HS-0912-C5-5x-d MI HSCEs Science - Chemistry 09-12 STANDARD C5: CHANGES IN MATTER

Topic C5.5x Chemical Bonds C5.5d Compare the relative melting point, electrical and thermal conductivity, and hardness for ionic, metallic, and covalent compounds.

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